Texas oilman T. Boone Pickens said Sunday he'll probably back Mitt Romney in the upcoming presidential race, claiming that President Obama "never has a plan" for American energy independence and that he abandoned the issue after winning election in 2008.

Pickens, who traditionally backs GOP candidates, sought to hold Obama to account for a 2008 campaign pledge he made to end oil imports from the Middle East within a decade.

Only three-and-a-half years have passed since then, but Pickens told "Fox News Sunday" that "never again has he mentioned that."

"I don't know whether he had a plan, or he doesn't have a plan, but now is the time to show up with a plan," Pickens said.

Pickens made waves in 2008 by launching a major initiative called the "Pickens Plan" aimed at weaning America off foreign energy -- he promoted alternative sources of domestic energy including wind, solar and natural gas.

Pickens, who says he lost $150 million betting on wind power, is now focusing his efforts on natural gas. Pickens expressed frustration Sunday that politicians tend to only talk about energy independence when the price of gasoline is high.

While saying Romney has only assembled a "skeleton" of an energy plan so far, Pickens expressed confidence that he'd come through.